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rtl: perips: fix machine timer 

Signed-off-by: liangkangnan <liangkangnan@163.com>
pull/4/head
liangkangnan 2021-06-03 09:23:50 +08:00
parent 646bc96419
commit c847244c5b
1 changed files with 8 additions and 6 deletions
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14
rtl/perips/machine_timer.sv
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@ -22,7 +22,7 @@ module machine_timer(
input wire[31:0] data_i, input wire[31:0] data_i,
input wire[3:0] sel_i, input wire[3:0] sel_i,
input wire we_i, input wire we_i,
output wire[31:0] data_o, output wire[31:0] data_o,
output wire irq_o output wire irq_o
); );
@ -37,7 +37,7 @@ module machine_timer(
reg[31:0] mtime_ctrl_d, mtime_ctrl_q; reg[31:0] mtime_ctrl_d, mtime_ctrl_q;
reg[31:0] mtime_cmp_d, mtime_cmp_q; reg[31:0] mtime_cmp_d, mtime_cmp_q;
reg[31:0] mtime_count_q; reg[31:0] mtime_count_q;
reg data_q; reg[31:0] data_d, data_q;
wire[3:0] rw_addr = addr_i[3:0]; wire[3:0] rw_addr = addr_i[3:0];
wire w0 = we_i & sel_i[0]; wire w0 = we_i & sel_i[0];
@ -77,12 +77,12 @@ module machine_timer(
// read // read
always @ (*) begin always @ (*) begin
data_q = 32'h0; data_d = data_q;
case (rw_addr) case (rw_addr)
mtime_ctrl_reg: data_q = mtime_ctrl_q; mtime_ctrl_reg: data_d = mtime_ctrl_q;
mtime_cmp_reg: data_q = mtime_cmp_q; mtime_cmp_reg: data_d = mtime_cmp_q;
mtime_count_reg: data_q = mtime_count_q; mtime_count_reg: data_d = mtime_count_q;
default:; default:;
endcase endcase
end end
@ -93,9 +93,11 @@ module machine_timer(
if (!rst_n) begin if (!rst_n) begin
mtime_ctrl_q <= 32'h0; mtime_ctrl_q <= 32'h0;
mtime_cmp_q <= 32'h0; mtime_cmp_q <= 32'h0;
data_q <= 32'h0;
end else begin end else begin
mtime_ctrl_q <= mtime_ctrl_d; mtime_ctrl_q <= mtime_ctrl_d;
mtime_cmp_q <= mtime_cmp_d; mtime_cmp_q <= mtime_cmp_d;
data_q <= data_d;
end end
end end